The Function of the Will.—Concerning the function of the will there can be no haziness or doubt. Volition concerns itself wholly with acts, responses. The will always has to do with causing or inhibiting some action, either physical or mental. We need to go to the dentist, tell some friend we were in the wrong, hold our mind to a difficult or uninteresting task, or do some other disagreeable thing from which we shirk. It is at such points that we must call upon the will.

Again, we must restrain our tongue from speaking the unkind word, keep from crying out when the dentist drills the tooth, check some unworthy line of thought. We must here also appeal to the will. We may conclude then that the will is needed whenever the physical or mental activity must be controlled with effort. Some writers have called the work of the will in compelling action its positive function, and in inhibiting action its negative function.

How the Will Exerts Its Compulsion.—How does the will bring its compulsion to bear? It is not a kind of mental policeman who can take us by the collar, so to speak, and say do this, or do not do that. The secret of the will's power of control lies in attention. It is the line of action that we hold the mind upon with an attitude of intending to perform it that we finally follow. It is the thing we keep thinking about that we finally do.

On the other hand, let us resolutely hold the mind away from some attractive but unsuitable line of action, directing our thoughts to an opposite course, or to some wholly different subject, and we have effectually blocked the wrong response. To control our acts is therefore to control our thoughts, and strength of will can be measured by our ability to direct our attention.

2. THE EXTENT OF VOLUNTARY CONTROL OVER OUR ACTS

A relatively small proportion of our acts, or responses, are controlled by volition. Nature, in her wise economy, has provided a simpler and easier method than to have all our actions performed or checked with conscious effort.

Classes of Acts or Response.—Movements or acts, like other phenomena, do not just happen. They never occur without a cause back of them. Whether they are performed with a conscious end in view or without it, the fact remains the same—something must lie back of the act to account for its performance. During the last hour, each of us has performed many simple movements and more or less complex acts. These acts have varied greatly in character. Of many we were wholly unconscious. Others were consciously performed, but without feeling of effort on our part. Still others were accomplished only with effort, and after a struggle to decide which of two lines of action we should take. Some of our acts were reflex, some were chiefly instinctive, and some were volitional.

Simple Reflex Acts.—First, there are going on within every living organism countless movements of which he is in large part unconscious, which he does nothing to initiate, and which he is largely powerless to prevent. Some of them are wholly, and others almost, out of the reach and power of his will. Such are the movements of the heart and vascular system, the action of the lungs in breathing, the movements of the digestive tract, the work of the various glands in their process of secretion. The entire organism is a mass of living matter, and just because it is living no part of it is at rest.

Movements of this type require no external stimulus and no direction, they are reflex; they take care of themselves, as long as the body is in health, without let or hindrance, continuing whether we sleep or wake, even if we are in hypnotic or anæsthetic coma. With movements of reflex type we shall have no more concern, since they are almost wholly physiological, and come scarcely at all within the range of the consciousness.

Instinctive Acts.—Next there are a large number of such acts as closing the eyes when they are threatened, starting back from danger, crying out from pain or alarm, frowning and striking when angry. These may roughly be classed as instinctive, and have already been discussed under that head. They differ from the former class in that they require some stimulus to set the act off. We are fully conscious of their performance, although they are performed without a conscious end in view. Winking the eyes serves an important purpose, but that is not why we wink; starting back from danger is a wise thing to do, but we do not stop to consider this before performing the act.